Subject: [patchset] inline functions related debloating, -V2

this patchset (for the 2.6.16 tree) consists of 4 loosely related 
patches (which can be applied in any order):

  gcc-no-forced-inlining.patch
  gcc-unit-at-a-time.patch
  gcc-mark-forced-inline.patch
  uninline-capable.patch

the purpose of these patches is to reduce the kernel's .text size, in 
particular if CONFIG_CC_OPTIMIZE_FOR_SIZE is specified. The effect of 
the patches on x86, using a generic .config is:

    text    data     bss     dec     hex filename
 3286166  869852  387260 4543278  45532e vmlinux-orig
 3194123  955168  387260 4536551  4538e7 vmlinux-inline
 3119495  884960  387748 4392203  43050b vmlinux-inline+units
 3051709  869380  387748 4308837  41bf65 vmlinux-inline+units+fixes
 3049357  868928  387748 4306033  41b471 vmlinux-inline+units+fixes+capable

i.e. a 7.8% code-size reduction. Using a tiny .config gives:

   text    data     bss     dec     hex filename
 437271   77646   32192  547109   85925 vmlinux-orig
 452694   77646   32192  562532   89564 vmlinux-inline
 431891   77422   32128  541441   84301 vmlinux-inline+units
 414803   77422   32128  524353   80041 vmlinux-inline+units+fixes
 414020   77422   32128  523570   7fd32 vmlinux-inline+units+fixes+capable

or an 5.6% reduction.

x86 allyesconfig gives:

    text     data     bss      dec  filename
 24190215 6737902 1775592 32703709  vmlinux-allyes-speed-orig
 20096423 6758758 1775592 28630773  vmlinux-allyes-orig
 19223511 6844002 1775656 27843169  vmlinux-allyes-inline+units+fixes+capable

or a 4.5% reduction ontop of the 20.4% that CC_OPTIMIZE_FOR_SIZE gives.

i've also done test-builds with CC_OPTIMIZE_FOR_SIZE disabled:

    text    data     bss     dec     hex filename
 4080998  870384  387260 5338642  517612 vmlinux-orig
 4084421  872024  387260 5343705  5189d9 vmlinux-inline
 4010957  834048  387748 5232753  4fd871 vmlinux-inline+units
 4010039  833112  387748 5230899  4fd133 vmlinux-inline+units+fixes
 4007617  833120  387748 5228485  4fc7c5 vmlinux-inline+units+fixes+capable

or a 1.8% code size reduction.

	Ingo